Percolator top fastener



July 7, 1936.

H. C. HETTINGER PERCOLATOR TOP FASTENER Filed Aug. 22, 1955 Patented July 7, 1936 UNITED STATES PATENT OFFICE 2,046,819 rERcoLA'roR ToP FASTENER Henry C. Hettinger, Chicago, Ill.

Application August 22, 1935, Serial No. 37,370

3 Claims. (Cl. 53-3) This invention relates Ato novel improvements in a percolator top fastener.

One of the main objects of this invention is to provide means for securely fastening and safely retaining the dome or top on the cover of a percolator, and prevent any accidental dropping out thereof whenever the cover is tilted; and also to hold the top so tightly in the cover that it prevents the escape of steam therebetween.

Another object is to provide such fastening means which is simple in structure and inexpensive in manufacture, and which is arranged to be easily but very securely mounted in position, without the need of any extra tool, but by the use simply of a handy household article, like a pair of shears.

'I'hese and various other objects and advantages will become apparent from the following description, taken in connection with the accompanying drawing, in which the invention is illustrated in its preferred form of construction, it being understood that various other arrangements and forms of construction may be resorted to for carrying out the objects and purposes of this invention.

In the drawing:

Fig. 1 is a vertical sectional view showing the improved fastener applied to a percolator cover, also indicating how a pair of shears may be used for easily mounting it is position.

Fig. 2 is an inverted plan View of the cover with the fastener thereon.

Fig. 3 is a sectional detail view, taken on line 3--3 of Fig. 2.

Fig. 4 is an inverted plan view of the fastener.

Fig. 5 is a sectional view thereof, taken on line 5 5 of Fig. 4.

Fig. 6 is a fragmentary View of a slightly modified form, showing the beveled portion on the fastener provided with a knurled or roughened face instead of a smooth one.

In the drawing my invention is illustrated in connection with a percolator cover or closure including a metallic lid I0 and a glass dome or top I I removably mounted thereon. The main intermediate part of the lid I0 is usually dome-shaped, as indicated in the drawing, and is provided with an annular flange I2 turned inwardly or downwardly from a top shoulder I 3 providing a central opening therein. A rim I5 is provided on top II to fit snugly in said flange and a peripheral bead I6 on said top is seated on shoulder I3. A pair of lugs I'I extend from the opposite parts of rim I5, being adapted to pass through passageways usually provided in the flange, and upon turning said top the lugs engage under flange I2 to hold said bead I6 tightly on the shoulder and to retain the top in position on the cover, when rst put in use.

After continued use of said cover the lid with its 5.

My improved fastener is designed and arranged 10 to draw the peripheral bead I6 firmly down on the shoulder I3 and to hold the top II securely and safely seated in the lid I0.

This fastener, as shown in the drawing, comprises a thin annular disc or washer-like member l5 I8 which is provided with notches I9 in the opposite parts thereof adapted to receive and pass over lugs I'I on the rim, so that this member can be placed on said rim, beyond said lugs, and then turned to secure member I8 between said lugs Il 20 and fiange I2. Beveled portions 20 are preferably also provided on member I8 and extend from each notch I9 partly around the member, substantially as indicated in the drawing, whereby a very thin edge 2| is provided adjacent each notch I9, 25 so as to facilitate mounting the fastening member I8 in position.

The washer-like member I8 is preferably made of metal and is slightly flexible, so that its outer edge will bear firmly under the dome-shaped por- 30 tion of the lid, while the inner edge of the member is forced upwardly by the lugs I'I during the turning of the member in mounting the same, as indicated in Fig. 1; thereby forming a double air tight connection, one between bead I6 and 35 shoulder I3, and the other between the outer part of fastener I8 and the engaged inside part of the lid. As member I8 is slightly resilient and is slightly fiexed in its firm engagement under the lid, it will constantly provide a firm connection 40 at this junction, as well as between shoulder I3 and bead I6.

As indicated in Fig. 6, member I8 may also have its beveled portion 20' provided with roughened or knurled means 22 on its face, so that lugs I'I will be held more securely in position thereon.

It is apparent that this fastener can be mounted in position on the cover by turning it by hand thereon; however, I preferably furthermore pro- 50 vide it with diametrically oppositely positioned openings 23 adapted to receive the points or end parts of a pair of shears 24 therein, substantially as indicated in Fig. 1, so that the fastener can be easily turned and forced in position on the top 55 and cover and will hold them tightly and securely together.

I claim:

1. The combination, with a percolator cover including a lid having an inwardly bent flange around an opening, also a top having a rim removably mounted in said flange to close the opening and containing lugs to engage below the flange for holding the top in position, of a fastener comprising a flat washer-like member having a central opening and the inner edge sur-- rounding the opening being adapted to fit around said rim and provided with notches to pass over said lugs, said member being provided with a pair of diametrically oppositely positioned means adapted to co-operate with the points of an instrument, whereby the fastener can be easily turned and firmly forced between `said lugs and the lid to hold the top securely in position.

2. The combination, with a percolator cover in'- cluding a lid having a dome-shaped portion provided vvith an inturned flange around a central opening and a top shoulder thereon, also a top having a rim removably mounted in said flange and a peripheral bead seated on said shoulder, and lugs provided on said rim to engage beneath said flange, of a fastener comprising a flat washer-like member Varranged to t removably around said rim vand provided With notches adapted to pass over said lugs, and beveled portions on said member extending from the notches partway around the member to engage over the lugs, there being openings provided in the member adapted to receive the points of a pair of shears, whereby the fastener can be easily turned and forced securely in position, so that the inner part of the member bears upon said lugs, the outer part of the member bears firmly below the dome-shaped portion of the lid, and said bead bears firmly on said shoulder, thereby providing a firm fastening connection between the top and the lid and securing them firmly together.

3. A fastener for securing the rim of a percolator top in the annular central flange of a rounded lid, ysaid fastener consisting of a thin substantially planar washer-like member which is somewhat flexible and has notches adapted to :pass over lugs provided on said rim in mounting the member thereon, and beveled portions on said member extending from the notches providing sharp ledges for readily entering over said lugs and facilitate mounting the member by rotating it on the rim, whereby the member ycan be easily mounted very :firmly on the rim, so that the inner part of the member is held tightly between 

